2*mono 23W A
nice ! What schematic did you use ? 6SN7 as driver for the GM70 ?
??????????? • ?????? ?????nice ! What schematic did you use ? 6SN7 as driver for the GM70 ?
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Here is are pix of my GM70. I now have all the parts and will punch the top plate next week and start assembly. The rec tubes are 6D22S half waves, the driver is the 12HL7. The first pic is just to show the base. The second pic shows will most of the components layed out.
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Here is a link to the build process. What a pain in the a$$.
AudioKarma.org Home Audio Stereo Discussion Forums - View Single Post - Hard financial times and a lack of funds has forced me into building a GM70 amp
AudioKarma.org Home Audio Stereo Discussion Forums - View Single Post - Hard financial times and a lack of funds has forced me into building a GM70 amp
I have had alook at your picture that you sent me and I must tell you that your transformers look too small to me. For your info the weight of the transformer that I have is 7.5kgs and I am afraid that it is still not sufficiently heavy. It has the size of 17,5 sq. cm. I don't know how many inches or pounds that would be but I think that you can easiliy convert these figures into lbs. and inches.
My another variant Bruce's OddWatt 6P3S!
Picasa ??? ?????? - Azazello - amplifiers
Picasa ??? ?????? - Azazello - amplifiers
Amplifier with Russian tubes 2x 6S45Pi (6С45П) + 6Pi45S (6П45С), rectifiers 2x 5C4S (5Ц4С)
The driver is in SRPP (30mA/300V) and fixed bias with 1,5V battery, output stage is in triode mode - 320V/120mA and fixed bias.
/edit/ p.s. I will upload the pictures somewhere else, the stupid server has resized them all...
The driver is in SRPP (30mA/300V) and fixed bias with 1,5V battery, output stage is in triode mode - 320V/120mA and fixed bias.
/edit/ p.s. I will upload the pictures somewhere else, the stupid server has resized them all...
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Amplifier with Russian tubes 2x 6S45Pi (6С45П) + 6Pi45S (6П45С), rectifiers 2x 5C4S (5Ц4С)
The driver is in SRPP (30mA/300V) and fixed bias with 1,5V battery, output stage is in triode mode - 320V/120mA and fixed bias.
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The driver is in SRPP (30mA/300V) and fixed bias with 1,5V battery, output stage is in triode mode - 320V/120mA and fixed bias.
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Attachments
Amplifier with Russian tubes 2x 6S45Pi (6С45П) + 6Pi45S (6П45С), rectifiers 2x 5C4S (5Ц4С)
That's a VERY nice looking build. Congrats.
Jeff
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